Variabilidade espacial de fatores de eros?o em Latossolo Vermelho eutroférrico sob cultivo de cana-de-a?úcar

摘要

The objective of this work was to evaluate the spatial variability of soil erosion factors on a Dark Red Oxisol under sugarcane conventional tillage. Soil samples were collected in 206 points, in a depth of 0.0-0.2 m, located in a 50 m regular grid for obtaining the soil texture and organic matter content. The local erosion factors were determined: erosivity (R), erodibility (K), relief (LS), soil erosion (A), natural potential of erosion (PNE), erosion risk (RE) and erosion expectation (EE). Geostatistical analysis was performed to measure and model the spatial variability of soil erosion factors. The soil variability was moderate with K, A, and PNE while the soil variability was higher with LS, RE, and EE. K, A, and PNE exhibited moderate spatial dependence, but spatial dependence of LS, RE and EE was strong. Kriging maps were presented for understanding of soil erosion factors distribution patterns within the landscape.